Paper trimmer



Ffifib 9 I c. L. FRIERMOQD 2,029,1

PAPER TRIMMER Filed. June 27, 1.935

INVENTOR ATTORNEYS Patented Feb. 4, 1936 PATENT OFFIQE PAPER TRIMJVIERCharles L. Friermood, Springfield, Ohio, assignor to Charles K.Hullinger, receiver for the Ridgely Trimmer Company, Springfield, Ohio,a corporation of Ohio Application June 27,

5 Claims.

This invention relates to improvements in wall paper trimmers, it moreparticularly relating to that class of trimmers designed to be used inconnection with a straight edge and having a rotary disk as the cuttingelement.

One of the objects of the invention is the provision'of simple,eiiective and improved means for eliminating cutter disk side play byeasily made adjustments whereby an erratic tracking of the disk isavoided.

Another object of the invention is to provide that with the same partsit is also possible to adjust the cutter disk laterally with respect tothe trimmer body and at the same time to remove any tendency forside-play to develop at any ne adjustments of the disk. 7

In the accompanying drawing:

Fig. 1 is an end elevation of a wall paper trimmer in which theimprovements are embodied.

Fig. 2 is a side elevation.

Fig. 3 is an enlarged transverse section on the line 3-3 of Fig. 2.

Fig. 4 is a fragmentary sectional view similar to Fig. 3 showing theparts in a differently adjusted working position than that shown in Fig.3. s

Fig 5'is a perspective view, partly broken away, of an assembly of theparts whereby the improved operation is obtained.

Fig. 6 is a fragmentary sectional view of a portion of the trimmer bodyonly, the section being taken on the line 3-3 of Fig. 2. The scale isthe same as in Fig. 3.

Fig. 7 is an elevation on the same scale as Fig. 3 of a detail.

Referring to the drawing, the trimmer body is indicated at I, and at 2are shown longitudinally aligned lugs integrally attached to the loweredge of the body I, each lug being finished on one side 2' to provide aslidable bearing along the vertical edge of a straight edge shownconventionally in broken lines at 3.

The cutter disk is shown at 4 and since the disk is comparatively thin,the usual flanges bushing 5 is employed in the present case, as is alsothe nut 6 by which the bushing is secured in place on the disk, theflange of the bushing being indicated at 8. The bushing is centrallyapertured for a rotative bearing on the cutter axle 1 in the usualmanner, but instead of the customary close tolerance necessary for thefit between the bore of the bushing and the axle on which it rotates,which closeness was formerly relied upon to reduce side-play, thepresent tolerance is more lib- 1935, Serial No. 28,629

eral, and a more rapid assembly of the trimmer is provided.

To eliminate side-play without the necessity of a close tolerance withreference to the fit of the bushing with the cutter axle, dependence isplaced on an assembly of members that are adjusted to bear against theopposite ends of the bushing 5. The outer side 8' (Fig. 5 only) of theflange 8 of the bushing 5 is finished in parallelism with the threadedend 9 (Fig. 5 only) of the bushing, and the outer side of the nut 6 isalso finished at the same time. In the trimmer body I is a cavity I0 inwhich the cutter disk is housed, and from the walls II and I2 enclosingthe cavity and forming a part of the body are integrally attachedtransversely aligned bosses I3 and I4. Each of these bosses is centrallyapertured and is provided at their ends with interior threads by tappinginto the central openings for a suitable distance.

The operation on the interior of the bosses is best seen in Fig. 6 takenin connection with the other views. The boss I4 is bored to provide theopening I5 and the tap is then run into this opening to provide thethreads I6 which extend from the outer end of the boss I4 toward theinner end thereof but stops short of extending into the cavity Ill. Theboss I3 is similarly threaded to provide the threads H, but from thecavity outward the bore I8 is provided which is larger in diameter thanthe aligned bore I5 for a purpose which will appear, as in this enlargedbore I8 there is placed a flanged sleeve I9. The sleeve I9 is shown infull lines in Figs. 3 and 4 in place within the boss I3, and in Fig. 6in broken lines preparatory to being placedin the bore I8 it being seenthat the sleeve enters the bore I8 from the cavity l0 and is slidablymoved to the left from the broken line position seen in Fig. 6.

It will be noted that the cutter axle I is formed of one piece and iscomparatively long and is provided with an enlarged diameter extendedportion 20 forming a shoulder 2I at the end of which there is a thread22. The larger portion 20 is adapted to fit comparatively snugly in thebore I5 of the boss I4, while the thread 22 engages the interior threadI6 in the same boss.

In assembly, the sleeve I9 is slipped into place in the bore I8 of theboss I3, and the cutter disk is temporarily held within the cavity ID ofthe body I along with a washer 23 whose central opening is such that thewasher will fit on the axle portion 1. The cutter axle I is theninserted through the openings in the boss I4, the portion 1 passingthrough the washer 23 and the cutter disk in the order named. Thethreaded portion 22 of the cutter axle is engaged in the thread I6 andthe axle is then screwed inwardly until a temporarily adjusted positionis made, which will be when the fiat side 4' of the cutter disk issubstantially in longitudinal alignment with the finished sides 2' ofthe lugs 2.

It will be seen in Figs. 3, 4 and 5 that the axle portion 7 extendsthrough the sleeve l9 into the boss [3 but is only indirectly supportedby said boss, the axle passing through and being directly supported byan exteriorly threaded thimble 24 which is centrally bored as at 24 toreceive the axle l. The threaded thimble 24 is shown in detail in Fig.7.At one end, the threads are removed to form the reduced diameter portion25 which in assembly projects into the bore.

When the threaded thimble 2 3 is in its place as shown in Figs. 3 and 4and is screwed inwardly in the boss l3 to a suflicient distance, theshoulder 26 seen on the threaded thimble makes contact with the sleevel9 and forces this sleeve slidably in the bore I8 until the flanged endiii of the sleeve it bears against the side 8 of the disk bushing 5.This pressure forces the cutter disk to make contact with the washer 23which then is stopped by the shoulder 2| on the cutter axle i.

It can be seen that two adjustments can be made whereby the position ofthe cutter disk may be varied and all side play thereof eliminated atany adjusted position. A lateral adjustment is sometimes necessary, asthe customary factory adjustment is to provide that the fiat side 4 ofthe cutter disk :3 is substantially in longitudinal alignment with thefinished side 2' of the body lugs 22, as mentioned in connection withthe previous statement that this alignment is a temporary adjustmentduring assembly.

To make the lateral adjustment as for instance to move the cutter disklaterally to the left, the thimble 24 is unscrewed while the cutter axlel is screwed inwardly to follow up the outward movement of the thimble24. It is easily seen that to move the disk laterally tothe right, thecutter axle '5 its unscrewed and the thimble 24 is screwed inwardly.

In Fig. 3 an adjustment is shown which is known as the factoryadjustment wherein the cutter disk is substantially as far to the leftas it should be placed, but owing to differences in the straight edgeson which the trimmer might be used, it is likely that the cutter diskshould be moved laterally to the right to avoid a rubbing of the cutterdisk against the vertical side 3 of the straight edge 3. The space seenbetween the flat side 4 of the cutter disk and the straight edge in Fig.4 is shown in an exaggerated manner. It will also be noticed in Fig. 4that there is a small clearance space between the flange l9 of thesleeve is and the inner surface of the wall H and also between thewasher 23 and the inner surface of the opposite wall I2, showing therange of lateral movement possible for the cutter disk.

To adjust to eliminate side play, the thimble 24 or as the case may bethe cutter axle 1, is screwed inwardly to the extent that the cutterdisk is clamped between the sleeve l9 and washer but not to the extentthat free rotation of the cutter disk is prevented. When a properadjustment is found, the parts may be locked in place by use of the setscrews 21 in the bosses l3 and I4.

Having thus described my invention, I claim:

1. In a paper trimmer, a body having a recess, an axially adjustableaxle formed of one piece carried by said body and extending across saidrecess, a. cutting disk in said recess and loosely mounted on said axle,a shoulder on said axle to adjust said disk laterally in one directionwith relation to the walls of said recess, and adjustable means carriedby said body to adjust said disk laterally in the opposite direction.

2. In a paper trimmer, a body having a recess, an axially adjustableaxle carried by said body and extending across said recess, a cuttingdisk in said recess and loosely mounted on said axle, a shoulder on saidaxle to adjust said disk laterally in one direction with relation to thewalls of said recess, and adjustable means carried by said body toadjust said disk laterally in the opposite direction, saidlast-mentioned adjustable means comprising a flanged sleeve slidablymounted on said axle together with a device for moving said sleeve.

3. In a paper trimmer, a body having a recess, an axle carried by saidbody having a threaded connection therewith so as to be axiallyadjustable, a cutting disk in said recess and loosely mounted on saidaxle, a shoulder on said axle to adjustsaid disk laterally in onedirection with relation to the walls of said recess, a flanged sleeveslidably mounted on said axle to adjust said disk in the oppositedirection, and an adjustable memberhaving a threaded connection withsaid body member and a shoulder to engage said sleeve. to slide the sameon said axle.

4. In a paper trimmer, a body having a recess 40 and a pair of alignedoppositely extending trunnions, an axle having a threaded connectionwith one of said trunnions and extending across said recess into theopposite trunnion, a cutting disk loosely mounted in said recess on saidaxle, said axle having a shoulder to adjust said disk laterally in onedirection, a flanged sleeve loosely mounted on said axle in the.trunnion which is located on the opposite side of said disk .from saidshoulder, and a member having a threaded connection with said lastmentioned trunnion and also having a shoulder to engage said sleeve.

5. In a paper trimmer, a body having a recess and a pair of alignedoppositely'extending trunnions, an axle carried by one of said trunnionsand having a threaded connection therewith so as to be capable of axialadjustment, said axle extending across said recess and loosely into theopposite trunnion, a cutting disk located in said recess and looselymounted on said axle, a sleeve slidably mounted on said axle in saidlast mentioned trunnion, the inner end of said sleeve having a flange, ascrew in said last mentioned trunnion having a shoulder to engage andmove said sleeve, said axle having a shoulder on the opposite side ofsaid disk from said sleeve and a loose washer between said lastmentioned shoulder and said disk.

CHARLES L. FRIERMOOD.

